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White rust of crucifers

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This PPT include introduction, symptoms, pathogen and management of white rust of crucifers

White rust of crucifers

  1. 1. White Rust / White Blisters of Crucefers DR. RAJBIR SINGH Assistant Professor Department of Plant Pathology Gochar Mahavidyalaya, Rampur Maniharan, Saharanpur (UP), India Affiliated to Ch. Charan Singh University, Meerut (UP), India Email: rajbir25805@yahoo.com, rajbirsingh2810@gmail.com Cell No. 91-9456613374
  2. 2. White Rust / White Blisters of Crucefers • All crucifers pls. affected • All parts of country • Occurs with D. M. (Parnospora parasitica) • Loss – 17 - 37%
  3. 3. Symptoms : • All parts affected except roots (1). Local infection • Leaves, stem, flower stalk – white /creamy, yellow blister like pustules (1-2 mm) • Powdery growth on pls/ on lower surface of leaves • Yellow on upper surface • White pustules on stem & siliquae
  4. 4. (2). Systemic infection • Systemic infection on new stem & inflorescence • Hypertrophy • Hyperplasia • Swelling & distortion of stem & floral parts resulting in hypertrophy & hyperplasia • Known as Staghead
  5. 5. Pathogen – Albugo candida • Survive in soil as Oospore in crop debris • Survive in seed (primary inoculum) • Survive on perennial weeds – horse radish • Secondary spread by– sporangia & zoospore • R. H. – >75% • Tem. – 5-12° C
  6. 6. Systemic Position Kingdom – Mycota/ Fungi Division – Eumycota Sub division – Mastigomycotina Class – Oomycetes Order – Pernosporales Family – Albuginaceae Genus – Albugo Species - candidia
  7. 7. Disease Management • Use certified seed • Seed treatment – Metalaxyl (Apron 35 SD)- @ 6 gm/ kg seed • Removal of weeds • Destroy plant debris • Crop rotation of 2-3 years • Deep ploughing • Early sowing • Use balance fertilizers – no heavy use of N2 • Spray- Mencozeb (Dithane M- 45 / Indofil M-45) @ 2 kg/hec. • Ridomil MZ 72 WP (mixture of Metaxyl 64% + Mencozeb 8%) @ 2 kg/hec. 3 sprayers at 15 days interval
  8. 8. Thank You
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This PPT include introduction, symptoms, pathogen and management of white rust of crucifers

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